>You don't need a precomposed code point to encode these characters in
>Unicode. You need a font which displays the triplets of characters
>with a good glyph, but i + circumflex + acute can all be encoded
>already.

In addition to a font as suggested, one needs an app that supports the
particular smart-font technology. A font you can use with Word 2003 or any
SILGraphite-based app is available from
http://scripts.sil.org/DoulosSILfont. Here is a small snapshot: